Slut shamed by teacher

Hello ;) !

So today was the picture for my yearbook, so I dressed in consequence, I made sure I was looking nice. So I wore a high waisted jeans and a cropped top. I was waiting on the wall taking to friends and my teacher just looked at me and yelled "what the.. Is that" while looking at my belly. I said "well it's a belly miss" and she just went crazy about how rude and slutty I was dressed. In front of all my classmates. Three times (when we got back into class). I was like well that's fine I dress myself as I want and I had some support from my classmates. So I was just wondering was you guys think about that. Btw I live and study in France so the dress code is less strict than in America I guess.